Method for producing organic substance and apparatus for producing organic substance

Abstract

Provided are a method for producing an organic substance and an apparatus for producing an organic substance that are capable of efficiently cooling a synthesis gas and converting the synthesis gas to an organic substance at a high conversion efficiency using a microbial catalyst. A method for producing an organic substance includes a step of passing a synthesis gas G 1 discharged from a gasifier 2 through a heat exchanger 20 to cool the synthesis gas G 1 , a step of passing the synthesis gas G 1 cooled with the heat exchanger 20 through a gas cooling tower 21 to cool the synthesis gas G 1 with water sprayed in the gas cooling tower 21 and a step of bringing the synthesis gas G 1 that has passed through at least the heat exchanger 20 and the gas cooling tower 21 into contact with a microbial catalyst to generate an organic substance.

The invention claimed is: 
     
       1. An apparatus for producing an organic substance comprising:
 a gasifier that generates a synthesis gas; 
 a heat exchanger through which the synthesis gas discharged from the gasifier is passed to be cooled; 
 a gas cooling tower through which the synthesis gas cooled in the heat exchanger is passed to be cooled by water spray; 
 an organic substance generation portion; and 
 a water scrubber which is disposed in a post-stage of the gas cooling tower and through which the synthesis gas cooled in the gas cooling tower is passed, 
 wherein the organic substance generation portion brings the synthesis gas that has passed through at least the heat exchanger, the gas cooling tower and the water scrubber into contact with the microbial catalyst to generate an organic substance. 
 
     
     
       2. The apparatus for producing an organic substance according to  claim 1 ,
 wherein a temperature of the synthesis gas discharged from the gasifier is 900° C. or higher. 
 
     
     
       3. The apparatus for producing an organic substance according to  claim 1 ,
 wherein the synthesis gas is cooled to a temperature of 200° C. or higher and 300° C. or lower in the heat exchanger. 
 
     
     
       4. The apparatus for producing an organic substance according to  claim 1 , further comprising:
 a filtration dust collector which is disposed in a post-stage of the gas cooling tower and through which the synthesis gas cooled in the gas cooling tower is passed, 
 wherein the organic substance generation portion brings the synthesis gas that has passed through at least the heat exchanger, the gas cooling tower, the filtration dust collector, and the water scrubber into contact with the microbial catalyst to generate an organic substance. 
 
     
     
       5. The apparatus for producing an organic substance according to  claim 1 ,
 wherein the synthesis gas is cooled to 40° C. or lower with the water scrubber. 
 
     
     
       6. The apparatus for producing an organic substance according to  claim 1 , further comprising:
 a distillation device that distills the organic substance, 
 wherein the distillation device uses a heat energy obtained from the synthesis gas with the heat exchanger for distillation. 
 
     
     
       7. The apparatus for producing an organic substance according to  claim 1 ,
 wherein the organic substance contains ethanol. 
 
     
     
       8. An apparatus for producing an organic substance comprising:
 a gasifier that generates a synthesis gas; 
 a heat exchanger through which the synthesis gas discharged from the gasifier is passed to be cooled to a temperature of 200° C. or higher and 300° C. or lower; 
 a gas cooling tower through which the synthesis gas cooled in the heat exchanger is passed to be cooled by water spray to a temperature of 100° C. or higher and 200° C. or lower; 
 a water scrubber which is disposed in a post-stage of the gas cooling tower and through which the synthesis gas cooled in the gas cooling tower is passed; and 
 an organic substance generation portion that brings the synthesis gas that has passed through at least the heat exchanger, the gas cooling tower and the water scrubber into contact with a microbial catalyst to generate an organic substance. 
 
     
     
       9. The apparatus for producing an organic substance according to  claim 8 ,
 wherein the synthesis gas is cooled to 40° C. or lower with the water scrubber.